[Bug]: Storybook has stopped loading TypeError: (0 , import_common.handlebars) is not a function

[paullewisn]

Describe the bug

Storybook has been working fine for me for weeks, until today. No new changes. Now it refuses to start.

I have tried storybook dev -p 6006 and npx storybook@latest init, I have also cleared my node modules and reinstalled.

> storybook dev --no-open --quiet -p 6006

@storybook/core v8.4.2

WARN The following packages are incompatible with Storybook 8.4.2 as they depend on different major versions of Storybook packages:
WARN - @storybook/[email protected] (8.4.2 available!)
WARN  Repo: https://github.com/storybookjs/storybook/tree/next/code/addons/essentials
WARN - @storybook/[email protected] (8.4.2 available!)
WARN  Repo: https://github.com/storybookjs/storybook/tree/next/code/addons/interactions
WARN - @storybook/[email protected] (8.4.2 available!)
WARN  Repo: https://github.com/storybookjs/storybook/tree/next/code/frameworks/nextjs
WARN - @storybook/[email protected] (8.4.2 available!)
WARN  Repo: https://github.com/storybookjs/storybook/tree/next/code/renderers/react
WARN - @storybook/[email protected] (8.4.2 available!)
WARN  Repo: https://github.com/storybookjs/storybook/tree/next/code/lib/test
WARN Please consider updating your packages or contacting the maintainers for compatibility details.
WARN For more on Storybook 8 compatibility, see the linked GitHub issue:
WARN https://github.com/storybookjs/storybook/issues/26031

info Found existing addon "@storybook/addon-controls", skipping.
info Found existing addon "@storybook/addon-viewport", skipping.
info Found existing addon "@storybook/addon-controls", skipping.
info Found existing addon "@storybook/addon-viewport", skipping.
info => Serving static files from ././public at /
=> Failed to build the preview
TypeError: (0 , import_common.handlebars) is not a function
    at getVirtualModules (./node_modules/@storybook/builder-webpack5/dist/presets/preview-preset.js:1:3007)
    at async iframe_webpack_config_default (./node_modules/@storybook/builder-webpack5/dist/presets/preview-preset.js:6:222)
    at async starter (./node_modules/@storybook/builder-webpack5/dist/index.js:1:6115)
    at async Module.start (./node_modules/@storybook/builder-webpack5/dist/index.js:1:9902)
    at async storybookDevServer (./node_modules/@storybook/core/dist/core-server/index.cjs:36000:11)
    at async buildOrThrow (./node_modules/@storybook/core/dist/core-server/index.cjs:35017:12)
    at async buildDevStandalone (./node_modules/@storybook/core/dist/core-server/index.cjs:37190:78)
    at async withTelemetry (./node_modules/@storybook/core/dist/core-server/index.cjs:35757:12)
    at async dev (./node_modules/@storybook/core/dist/cli/bin/index.cjs:2591:3)
    at async s.<anonymous> (./node_modules/@storybook/core/dist/cli/bin/index.cjs:2643:74)

WARN Broken build, fix the error above.
WARN You may need to refresh the browser.

Reproduction link

None

Reproduction steps

No response

System

System:
OS: macOS 14.7.1
CPU: (10) arm64 Apple M1 Max
Shell: 5.9 - /bin/zsh
Binaries:
Node: 22.9.0 - ~/.nvm/versions/node/v22.9.0/bin/node
Yarn: 4.4.0 - /opt/homebrew/bin/yarn <----- active
npm: 10.8.3 - ~/.nvm/versions/node/v22.9.0/bin/npm
Browsers:
Chrome: 130.0.6723.92
Safari: 17.6
npmPackages:
@storybook/addon-essentials: ^8.2.9 => 8.2.9
@storybook/addon-interactions: ^8.2.9 => 8.2.9
@storybook/addon-links: ^8.2.9 => 8.2.9
@storybook/addon-onboarding: ^8.2.9 => 8.2.9
@storybook/blocks: ^8.2.9 => 8.2.9
@storybook/nextjs: ^8.2.9 => 8.2.9
@storybook/react: ^8.2.9 => 8.2.9
@storybook/test: ^8.2.9 => 8.2.9
@storybook/types: ^8.2.9 => 8.2.9
eslint-plugin-storybook: ^0.8.0 => 0.8.0
msw-storybook-addon: ^2.0.4 => 2.0.4
storybook: ^8.2.9 => 8.4.2

Additional context

No response

[paullewisn]

Fixing the version to 8.2.9 seems to cure it

[shilman]

We removed handlebars in 8.4 to slim down our package install size. I would recommend upgrading all your packages to 8.4, or fixing the version to 8.2 as you've done. In your log you're running [email protected] but 8.2.9 of the rest of the packages.